there are 20 color picker fields but after 14th color picker field, rest of the color picker fields not showing color picker when mouse clicked on field input box.so first 14 showing but not others !! i tried to move those in another fieldset but no solution.

Edited:
Here are all fields under design fieldset.i did not posted other fieldsets.so problem was color picker was not appearing starting from fb_postandlinksecbordercolor field.now having problem that only first field's color picker showing not others!

The broblem is on color code. If you use html code (like #2033b2) it work fine.. when you use a labelled color (like yellow or maroon in your case) the following field don't show color picker. You have to use only html color codes.